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Junichi Kumasako
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Yasu, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Chromatic dispersion compensating apparatus
Patent number
7,936,993
Issue date
May 3, 2011
Fujitsu Limited
Hiroki Ooi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Chromatic dispersion compensating apparatus
Patent number
7,751,706
Issue date
Jul 6, 2010
Fujitsu Limited
Hiroki Ooi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Chromatic dispersion compensating apparatus
Patent number
7,466,920
Issue date
Dec 16, 2008
Fujitsu Limited
Hiroki Ooi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmission system, optical repeater, and optical transmis...
Patent number
7,372,622
Issue date
May 13, 2008
Fujitsu Limited
Kentaro Nakamura
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Raman amplifier and optical communication system including the same
Patent number
7,307,782
Issue date
Dec 11, 2007
Sumitomo Electric Industries, Ltd.
Tetsufumi Tsuzaki
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Optical transmission system, optical repeater, and optical transmis...
Patent number
7,075,709
Issue date
Jul 11, 2006
Fujitsu Limited
Kentaro Nakamura
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Bidirectionally transmittable optical wavelength division multiplex...
Patent number
6,941,074
Issue date
Sep 6, 2005
Fujitsu Limited
Kentaro Nakamura
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmission system and optical transmission method utilizi...
Patent number
6,741,389
Issue date
May 25, 2004
Fujitsu Limited
Junichi Kumasako
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Patents Applications
last 30 patents
Information
Patent Application
Chromatic dispersion compensating apparatus
Publication number
20100135664
Publication date
Jun 3, 2010
FUJITSU LIMITED
Hiroki Ooi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Chromatic dispersion compensating apparatus
Publication number
20090080894
Publication date
Mar 26, 2009
Fujitsu Limited
Hiroki Ooi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Raman amplifier and optical communication system including the same
Publication number
20080074733
Publication date
Mar 27, 2008
Sumitomo Electric Industries, Ltd.
Tetsufumi Tsuzaki
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
Optical transmission system, optical repeater, and optical transmis...
Publication number
20060176545
Publication date
Aug 10, 2006
FUJITSU LIMITED
Kentaro Nakamura
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Chromatic dispersion compensating apparatus
Publication number
20030185568
Publication date
Oct 2, 2003
FUJITSU LIMITED
Hiroki Ooi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Optical transmission system, optical repeater, and optical transmis...
Publication number
20030117693
Publication date
Jun 26, 2003
FUJITSU LIMITED
Kentaro Nakamura
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Optical transmission system and optical transmission method utilizi...
Publication number
20030099030
Publication date
May 29, 2003
Junichi Kumasako
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Raman amplifier and optical communication system including the same
Publication number
20030063371
Publication date
Apr 3, 2003
Tetsufumi Tsuzaki
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
Bidirectionally transmittable optical wavelength division muliplexe...
Publication number
20020051267
Publication date
May 2, 2002
Kentaro Nakamura
H04 - ELECTRIC COMMUNICATION TECHNIQUE